<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="font/iconfont.css">
</head>

<style>
    .a {
        font-size: 100px;
        color: red;
    }
</style>

<body>
    <span class="a iconfont icon_alarmclock"></span>
    <span class="iconfont icon_about"></span>
    <span class="iconfont icon_address"></span>
</body>

</html>